All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=755978

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=4ded7e252f84d6da43870249b691afa37e71d7ec48eb72520b217d46b8999c04


Bot(s) for this bug's original alert(s):

chromium-rel-mac-retina
chromium-rel-mac11
chromium-rel-mac12
chromium-rel-win10
chromium-rel-win7-gpu-intel
chromium-rel-win7-gpu-nvidia
chromium-rel-win8-dual
win-high-dpi

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8971096878749774656

=== BISECT JOB RESULTS ===
Perf regression found with culprit

Suspected Commit
  Author : perezju
  Commit : 122dd5e91bf64888049459ce73a8fd34c084cfe0
  Date   : Mon Aug 14 12:28:51 2017
  Subject: [Telemetry] Reuse shared state between story runs

Bisect Details
  Configuration: win_8_perf_bisect
  Benchmark    : loading.desktop
  Metric       : timeToFirstContentfulPaint_avg/pcv1-warm/Yandex
  Change       : 1880.10% | 75.6216666748 -> 1497.38333334

Revision                                 Result                  N
chromium@494045                          75.6217 +- 204.004      6      good
chromium@494046                          37.6143 +- 8.57774      6      good
chromium@494046,catapult@122dd5e91b      1701.44 +- 336.92       6      bad       <--
chromium@494047                          1664.92 +- 208.567      6      bad
chromium@494048                          1650.12 +- 180.323      6      bad
chromium@494051                          1682.06 +- 124.294      6      bad
chromium@494057                          1621.95 +- 294.163      6      bad
chromium@494069                          1699.36 +- 520.537      6      bad
chromium@494093                          1486.28 +- 114.714      6      bad
chromium@494141                          1497.38 +- 228.441      6      bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=release --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests --story-filter=Yandex loading.desktop

More information on addressing performance regressions:
  http://g.co/ChromePerformanceRegressions

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8971096878749774656


For feedback, file a bug with component Speed>Bisection